Free Data URI Generator (File to Base64)
Convert a file or image into a Base64 data URI · ready to inline into HTML, CSS, or JSON. The file is read locally and never uploaded.
Frequently asked
When should I inline a file as a data URI?
For tiny assets (under ~4 KB) that block rendering · small icons, inline SVG fallbacks, favicons in single-file pages. Inlining removes a network round-trip but bloats the document by ~33%, so keep it for small files.
Is my file uploaded to convert it?
No · the FileReader API reads the file inside your browser and produces the Base64 string locally. Nothing is transmitted or stored.
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